Inbreeding depression in crambe1

Ana Carolina Da Costa Lara-Fioreze,Universidade Federal De Santa Catarina, Brazil ,Maurício Dutra Zanotto,Laerte Gustavo Pivetta,Universidade Estadual Paulista, Brazil ,

doi:10.1590/1983-40632016v4641811

Abstract

ABSTRACT Inbreeding depression in plants, caused by selfing or crossing among plants with a high degree of relatedness, is a genetic phenomenon that affects quantitative traits. This study aimed at verifying the occurrence of inbreeding depression in crambe progenies originated from selfing, in comparison with open pollination progenies. A randomized blocks design, with three replications, in a 32 x 2 factorial arrangement, with 32 crambe progenies and two reproduction systems (artificial selfing and open pollination), was used. Grain yield, 1,000-grain weight, plant height and final stand were evaluated. A significant interaction was observed between progenies and reproduction systems in all traits evaluated. A reduction in grain yield, 1,000-grain weight and plant height occurred in the majority of the selfing progenies, when compared to open pollination progenies. Inbreeding depression was observed in all traits, especially for grain yield. The heritability coefficients of selfed progenies were higher than the open pollinated ones, except for 1,000-grain weight.

Highlights

Crambe (Crambe abyssinica Hochst), a species of the Brassicaceae family (Desai et al 1997), has attracted the interest of producers due to its short cycle and possibility of completely mechanized cultivation
One of the products that may be obtained from the crambe oil is erucamide, an organic amide and erucic acid derivative that may be employed in cosmetics and other industrial uses (Falasca et al 2010)
The significant interaction between progenies and means of reproduction indicates that the crambe progenies did not respond with respect to means of reproduction

Summary

Introduction

Crambe (Crambe abyssinica Hochst), a species of the Brassicaceae family (Desai et al 1997), has attracted the interest of producers due to its short cycle and possibility of completely mechanized cultivation. The seeds are its main raw material, containing approximately 37 % of oil (Glaser 1996) with 55-60 % of erucid acid (Lessman & Berry 1967), which may be used as an industrial lubricant, corrosion inhibitor or as an ingredient in synthetic rubber manufacturing. One of the products that may be obtained from the crambe oil is erucamide, an organic amide and erucic acid derivative that may be employed in cosmetics and other industrial uses (Falasca et al 2010).

Objectives

Methods

Results